WorksheetsITN 100 Module 12 Exam Review
Total questions: 38
Worksheet time: 19mins
How many transponders are contained within a typical satellite?
24 to 32
32 to 48
16 to 24
8 to 16
Of all the DSL standards, which is the most commonly in use today?
VDSL
ADSL
SDSL
G.Lite
An 802.11ac signal can travel for approximately 2 miles from the source.
True
False
Although MPLS can operate over Ethernet frames, it is more often used with other Layer 2 protocols, like those designed for WANs.
True
False
With a SIP trunk, what is the only limitation on the number of calls that can run at any one time?
The maximum number of channels available on the transmission medium.
The total number of SIP bearer channels provisioned on the SIP switch.
The total number of time division slots allocated to the SIP client organization.
The amount of available bandwidth.
DSL services require many subscribers to share the same local line, causing potential security concerns.
True
False
CDMA (Code Division Multiple Access) is an open standard that is accepted and used worldwide.
True
False
When using satellite services for your WAN connection, what statement is accurate?
Satellite services are only available for fixed location clients.
Satellite uplink rates range from 5 to 10 Mbps.
Satellite services suffer more latency and jitter issues.
Satellite downlink rates range from 50 to 100 Mbps.
In an ISDN connection, what amount of throughput did a single B channel provide?
64 Kbps
96 Kbps
32 Kbps
48 Kbps
In a public switched telephone network, what portion of the network is known as the local loop?
It is the portion that connects any residence or business to the nearest central office.
It is the inside wire within the residence or business that connects to the NIU.
It is the portion of the network between the NIU and the remote switching facility.
It is the portion of the network from the remote switching facility to the central office.
Which SONET OC level is a popular choice for large businesses, and is equivalent to 100 T1s?
OC-1
OC-3
OC-12
OC-24
In a public switched telephone network, lines are terminated at the central office.
True
False
When using DOCSIS 3.0, what is the minimum number of channels that can be used?
2
1
4
16
Which statement regarding the Asynchronous Transfer Mode (ATM) technology is accurate?
ATM can provide 4 levels of QoS, from best effort delivery to guaranteed, real-time transmission.
ATM is highly dependent on predetermined schemes that specify the timing of data transmissions.
ATM is a point-to-multipoint WAN access technology that uses packet switching.
In ATM, a message is called a frame and always consists of 1500 bytes of data.
DSL signals travel over telephone lines using the 300 to 3300 Hz frequency range.
True
False
Multiplexing enables a single T1 circuit to carry how many channels?
24
12
1
64
Considering that multiple users occupy the same channel when using CDMA, how are various calls using this technology kept separate?
The transmissions are encrypted, such that only the appropriate device can decrypt its own call.
The packets are coded such that individual calls can be distinguished.
The sending and receiving of data is performed on different frequencies. Users hop between these frequencies to avoid interference.
The packets include the end user's SIM IMEI in each packet.
What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises?
OC-48
OC-96
OC-12
OC-3
The DTE or endpoint device for a leased line is known as which device below?
CSU/DSU
cable modem
ISDN modem
DSL modem
A fractional T1's bandwidth can be leased multiples of what data rate?
28 Kbps
48 Kbps
64 Kbps
32 Kbps
On an ATM network, how is the path that data will take determined?
Switches determine the optimal path between sender and receiver, and then establish the path before transmission.
When data is ready to be transmitted, an ATM participating router will contact the destination ATM router, establish a tunnel, then pass the data.
Data is transmitted, and then the path taken will vary depending on the load encountered at each ATM participant node.
A frame relay route table establishes each hop that will be taken to a single destination.
Which of the following is an advantage of leasing a frame relay circuit over leasing a dedicated circuit?
The paths that your data will take are always known.
You are guaranteed to receive the maximum amount of bandwidth specified in the circuit contract
You pay only for the bandwidth you require.
Frame relay is a newly established network technology with more features than other technology.
In a frame relay WAN, the ISP typically has the data circuit terminating equipment (DCE).
True
False
What is the size of an ATM cell, including the header?
64 bytes
84 bytes
53 bytes
48 bytes
What is a data-link connection identifier (DLCI) utilized for?
It is used by routers to determine which circuit to forward a frame to in a frame relay network.
It is used by routers to establish a packet-switched path to the destination.
It is used by ATM switches to determine how to create a switched virtual circuit.
It is a locally significant ID used to send connectionless information.
What is the maximum throughput of a DS3 connection?
274.176 Mbps
3.152 Mbps
1.544 Mbps
44.736 Mbps
The T-carrier standards, also called T-CXR standards, utilize what type of multiplexing over two wire pairs to create multiple channels?
orthogonal frequency division multiplexing (OFDM)
time division multiplexing (TDM)
frequency division multiplexing (FDM)
wavelength division multiplexing (WDM)
In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?
Intra-city Ethernet
Carrier Ethernet Transport
Metro Carrier Transport
Ethernet SONET
The C-Band utilized by satellites consists of what frequency range?
1.5 - 2.7 GHz
2.7 - 3.5 GHz
12 - 18 GHz
3.4 - 6.7 GHz
Which of the following Layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone?
SONET (Synchronous Optical Network)
digital subscriber line (DSL)
T-carrier (T1s, fractional T1s, and T3s)
Carrier-Ethernet Transport (CET)
The word "synchronous" as used in the name of Synchronous Optical Network means that data being transmitted and received by nodes must conform to a timing scheme.
True
False
In North America, what ISDN connection type used two B channels and one D channel?
Bearer Rate Interface (BRI)
Dedicated Rate Interface (DRI)
Primary Rate Interface (PRI)
Basic Rate Interface (BRI)
Which statement regarding the use of cable modems is NOT accurate?
Modems that utilize the DOCSIS 3.0 or 3.1 standard are backward compatible with older DOCSIS networks.
DOCSIS 3.1 allows for full duplex speeds up to 10 Gbps.
Cable modems only operate at the Physical layer of the OSI model.
Cable broadband provides a dedicated and continuous connection.
The Global System for Mobile Communications (GSM) utilizes what technology to create timeslots on a channel?
dense wavelength division multiplexing (DWDM)
wavelength division multiplexing (WDM)
frequency division multiplexing (FDM)
time division multiple access (TDMA)
What type of virtual circuit allows connections to be established when parties need to transmit, then terminated after the transmission is complete?
switched virtual circuit (SVC)
looping virtual circuit (LVC)
dynamic virtual circuit (DVC) permanent virtual circuit (PVC)
permanent virtual circuit (PVC)
WANs connect nodes, such as workstations, servers, printers, and other devices, in a small geographical area on a single network.
True
False
In a cellular network, where does each wireless base station connect to?
They connect directly to the central office.
They connect to a wireless station repeater.
They connect to other wireless base stations, then to the central office.
They connect to a mobile switching center.
Where are MPLS labels placed within a frame?
between the layer 3 header and the data payload
between the layer 2 header and the layer 3 header
at the end of the layer 2 trailer
between the data payload and the layer 2 trailer
